SB20260917149 - Race condition in Linux kernel amd amdkfd driver

Description

This security bulletin contains information about 1 vulnerability.

1) Race condition (CVE-ID: CVE-2026-89811)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a race condition in the AMD KFD MES queue management code when evicting or suspending MES queues while DMA descriptors are in flight. A local user can trigger queue eviction or suspension while in-flight DMA descriptors access unmapped memory to cause a denial of service.

The issue occurs during SVM page migration.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/6aae545c87087e4dc96e205452243813bfa73ba2
• https://git.kernel.org/stable/c/94e25cb6ab7f4f025bcdcd8ea79fda30f12843a4
• https://git.kernel.org/stable/c/e230c546ed93741833ab5babb0b202f9c2052b45